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Previously only "org.h5l.kcm" was allowed, but user reports indicate
needing to access the "com.apple.GSSCred" service as well.

R=kerrnel@chromium.org, rsesek@chromium.org

Bug: 1134449
Change-Id: I4c61c82f448de8409c5e5cf3878451a4d69e1264
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2560804Reviewed-by: Robert Sesek <rsesek@chromium.org>
Commit-Queue: Robert Sesek <rsesek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#832131}